@misc{indiciaeb0a428e1fd33,
  title = {Positioning questioned.},
  author = {S L McCallum},
  year = {1987},
  doi = {10.1016/s0001-2092(07)66449-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/3651141/},
  note = {Source identifier: 3651141}
}